title of program: preventing and treating …...the university of vermont designates this web...

Title of Program: Preventing and Treating Retinopathy of Prematurity: Evidence from Cochrane Systematic Reviews

Speakers/Moderators: Roger F. Soll, MD, James Hagadorn, MD

Planning Committee: Jeffery D. Horbar, MD, Madge E. Buus-Frank, RN, MS, APRN-BC, FAAN, Roger F. Soll, MD

Date: December 18, 2017

Learning Objectives:

Participants will be presented with evidence from clinical trials and systematic reviews and will be able to evaluate and translate the evidence in the field of neonatology to better serve their practices. Specifically, evidence for strategies regarding the prevention and treatment of retinopathy of prematurity will be presented and critiqued.

DISCLOSURE:

Is there anything to disclose? No financial interests to disclose

COMMERCIAL SUPPORT ORGANIZATIONS (if applicable): No Commercial Support

This activity has been planned and implemented by The Robert Larner College of Medicine at The University of Vermont and Cochrane Neonatal is

accredited by the American Nurses Credentialing Center (ANCC), the Accreditation Council for Pharmacy Education (ACPE), and the Accreditation

Council for Continuing Medical Education (ACCME), to provide continuing education for the healthcare team.

The University of Vermont designates this web seminar for a maximum of 1 AMA PRA Category 1 Credit(s)™. Physicians should claim only the

credit commensurate with the extent of their participation in the activity.

Trusted evidence. Informed decisions. Better health.

Preventing and Treating

Retinopathy of Prematurity:

Evidence from Cochrane

Systematic Reviews

Conference begins at 12 Noon ESTDecember 18, 2017

Supported by: Vermont Oxford Network

The Basics

∙ Follow slides on the Internet

∙ Listen on your phone or speakerphone

∙ Chat feature - questions anytime

∙ Your phone will be muted during talks

∙ Questioner unmuted during Q&A

Use the raised hand icon to queue up for questions

Cochrane Preparing, maintaining and promoting

the accessibility of systematic reviews

of the effects of health care interventions

Cochrane Neonatal Prepares and disseminates

evidence-based reviews of the effects

of therapies in the field of neonatal medicine

Editorial Team

Jennifer SpanoTrial Search Coordinator

Roger F. SollCoordinating Editor

Colleen OvelmanManaging Editor

Michael BrackenYale University

Jeffrey HorbarUniversity of Vermont

Bill McGuireHull York Medical School

Gautham SureshBaylor University

Editorial Team

Guest Discussant

James Hagadorn, MDAssociate Professor of Pediatrics

University of Connecticut School of Medicine

In Memory

Jerold F. Lucey, MDProfessor Emeritus

University of Vermont College of Medicine

Remembering Dr. Jerry Lucey, teacher, mentor, colleague, and friend.

Support

Cochrane Neonatal acknowledges the generous support form Vermont Oxford Network in producing these seminars

Disclosure

Roger F. Soll is theCoordinating Editor of Cochrane Neonatal

andPresident of Vermont Oxford Network

Why These Webinars?

To develop an understanding ofthe evidence supplied by systematic reviews in

neonatal perinatal medicine(as well as other large well conducted trials)

and discuss how this evidence might influence your practice.

We will review the evidence fromrandomized trials and meta-analyses

and discuss the different approaches that teams around the world are using regarding the

prevention and treatment of retinopathy of prematurity.

Retinopathy of Prematurity

1887 1950

Retinopathy of Prematurity is in many waysthe story of oxygen use in the preterm newborn….

Oxygen in the Preterm Infant

“In the 1940s, Wilson and colleagues observed that periodic breathing in premature infants was nearly eliminated with the use of 70% oxygen.

Although Wilson cautioned against unrestricted use of oxygen, other investigators and the American Academy of Pediatrics advocated its liberal use….”

Polin NEJM 2013

Retinopathy of Prematurity(Retrolental Fibroplasia)

First described in 1942:

“Grayish white opaque membrane behind each crystalline lens”

Terry 1942

Retinopathy of PrematurityPathogenesis

Phase 1: Relative retinal hyperoxia and interruption

of normal vascularization

• retinal response to hyperoxia is vasoconstriction

• reduced vascular endothelial growth factor (VEGF)

Phase 2: Hypoxia-revascularization

• VEGF is upregulated in response to hypoxia

• Abnormal neovascularization can occur

Stages of Retinopathy of Prematurity

Scheme of retina of right eye (RE) and left eye (LE) showing zone borders and clock hours used to describe the location and extent of retinopathy of prematurity (adapted the Committee for the Classification of Retinopathy of Prematurity).

From: The International Classification of Retinopathy of Prematurity Revisited

Arch Ophthalmol. 2005;123(7):991-999. doi:10.1001/archopht.123.7.991


Typical Relative Risk and 95% CI

OutcomeTypical

Risk Difference(95% CI) 0.5 1.0 2.0 4.00.2

Decreased IncreasedRisk

0.5 1.0 2.0 4.00.2

Effect of Restricted Oxygen on Retrolental Fibroplasia

ACTIVE RLF -0.30 (-0.39,-0.21)

Overview of 3 Randomized Controlled Trials

CICATRICIAL RLF -0.13 (-0.20,-0.06)

DEATH 0.03 ( -0.02, 0.07)

DEATH OR CICATRICIAL RLF -0.07 (-0.16, 0.03)

Watts 1992

Epidemic of ROP

1940 1950 1960 1970 1980 1990

Nu

mb

er

of

ca

se

s Oxygencurtailed

0%

10%

20%

30%

40%

50%

60%

MORTALITY

% C

ASES

BEFORE (1944-1948) AFTER (1954-1958)

AVERY et al. Recent increase in mortality from hyaline membrane disease. J Pediatrics 1960

MORTALITY BEFORE (1944-1948) AND AFTER (1954-1958) INTRODUCTION OF A POLICY OF OXYGEN RESTRICTION IN

INFANTS BIRTH WEIGHT 1000-1499 GRAMS

42%

58%

Effect of Restricted Oxygen on Mortality

0%

10%

20%

30%

40%

50%

60%

70%

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

% V

LB

W I

NF

AN

TS

VERMONT OXFORD NETWORK ANNUAL REPORTS 2000-2016

X

X

Any ROP

ROP > stage 2


Use of Oxygen and Retinopathy of Prematurity

• Blood gases• Transcutaneous Monitoring• Policies/guidelines to decrease oxygen exposure• Recent multicenter trials (NeoProM)

Oxygen Monitoring andRetinopathy of Prematurity

BLOOD GASES


Blood gases

Like watching a football game and checking in on the score every quarter…

First Quarter Giants 12 Patriots 9Second Quarter Giants 18 Patriots 12Third Quarter Giants 25 Patriots 15Fourth Quarter Giants 31 Patriots 18


Blood gases

So what happened in the First Quarter?

Did the Giants score 4 field goals, or a touchdown, a missed extra point and 2 field goals, or a touchdown and a field goal and a safety?

Have to watch the game more closely to know!


Transcutaneous oxygen monitoring

0%

10%

20%

30%

40%

50%

60%

ANY RETINOPATHY OF PREMATURITY

% C

ASES

TcPO2 MONITORING CONVENTIONAL MANAGEMENT

BANCALARI et al. Influence of transcutaneous oxygen monitoring on the incidence of retinopathy of prematurity. Pediatrics 1987; 79: 663-669

Continuous TcPO2 Monitoring Compared toIntermittent PaO2 Monitoring

Retinopathy of prematurityAll Study Infants BW 500-1300 grams

RD -0.11 (-0.21, 0.01)

35%

45%

Relative Risk and 95% CI

OutcomeRisk Difference

( 95% CI ) 0.5 1.0 2.0 4.00.2


0.5 1.0 2.0 4.00.2

ANY ROP -0.11 (-0.21, 0.01)

BANCALARI AND COWORKERS 1987

CICATRICIAL ROP -0.01 (-0.05, 0.03)

DEATH 0.08 (-0.02, 0.18)

DEATH OR ROP -0.02 (-0.13, 0.09)

BANCALARI et al. Influence of transcutaneous oxygenmonitoring on the incidence of retinopathy of prematurity.Pediatrics 1987; 79: 663-669

Continuous TcPO2 Monitoring Compared toIntermittent PaO2 Monitoring

Oxygen saturation monitoring

Oxygen dissociation curve

0%

10%

20%

30%

40%

50%

60%

70%

ROP CEREBRAL PALSY SURVIVAL

% C

AS

ES

O2 SAT 70-90% O2 SAT 88-98%

Lower Oxygen Saturation and the Impact on Retinopathy of Prematurity

Tin W et al. Pulse oximetry, severe retinopathy, and outcome at one year in babies of less than 28 weeks gestation. Arch Dis Child Fetal Neonatal Ed 2001;84:F106-110

53% 52%

15% 17%

6%

27%

Effects of targeting lower versus higher arterial oxygen

saturations on death or disability in preterm infants

Askie LM, Darlow BA, Davis PG, Finer N, Stenson B, Vento M, Whyte R.

Cochrane Database of Systematic Reviews 2017, Issue 4. Art. No.: CD011190. DOI:

10.1002/14651858.CD011190.pub2.



Objectives:

1. What are the effects of targeting lower versus higher oxygen

saturation ranges on death or major neonatal and infant

morbidities, or both, in extremely preterm infants?

2. Do these effects differ in different types of infants, including

those born at a very early gestational age, or in those who are

outborn, without antenatal corticosteroid coverage, of male

sex, small for gestational age or of multiple birth, or by mode

of delivery?

NeOProM

Characteristics of randomized trials included in the NeoProM Collaboration



Results:

• Five trials, which together enrolled 4965 infants, were

eligible for inclusion.

• The investigators of these five trials had prospectively

planned to combine their data as part of the NeOProM

(Neonatal Oxygen Prospective Meta-analysis)

Collaboration.

SUPPORT TRIAL

N Engl J Med. 2010 May 27;362(21):1959-69. Epub 2010 May 16.

SUPPORT TRIAL

N Engl J Med. 2010 May 27;362(21):1959-69. Epub 2010 May 16.

Median Oxygen Saturation with Oxygen Supplementationin the Low Target and High Target Groups

0%

10%

20%

30%

40%

50%

SEVERE ROP DEATH SEVERE ROP/DEATH

% C

AS

ES

LOW SATURATION HIGH SATURATION

SUPPORT NEJM 2010

OXYGEN SATURATION TARGETS AND OUTCOMESIN EXTREMELY PREMATURE INFANTS

OUTCOME OF INFANTS IN THE SUPPORT TRIAL

RR 0.90 (0.76 to 1.06)

RR 0.52 (0.37 to 0.73) RR 1.27 (1.01 to 1.60)

9%

18% 20% 16%

28%32%

0%

10%

20%

30%

40%

50%

NDI DEATH OR NDI

% C

AS

ES

LOW SATURATION HIGH SATURATION

SUPPORT TRIAL PAS 2012

OUTCOME OF INFANTS IN THE SUPPORT TRIAL: DEVELOPMENTAL FOLLOW UP

RR 1.12 (0.94 to 1.32)

RR 0.87 (0.60 to 1.28)

9.5% 10.5%

30.2% 27.5%



Effect on Death or Major Disability to 18 to 24 months

Typical RR 1.04 (95% CI 0.98 to 1.10)



Effect on Death to 18 to 24 months

Typical RR 1.16 (95% CI 1.03 to 1.31)

Typical RD 0.03 (95% CI 0.01 to 0.05)



Effect on Major Disability to 18 to 24 months

Typical RR 1.01 (95% CI 0.93 to 1.09)



Effect on Severe Retinopathy of Prematurity

Typical RR 0.72 (95% CI 0.61 to 0.85)

Typical RD -0.04 (95% CI -0.06 to -0.02)



Effect on Necrotizing Enterocolitis

Typical RR 1.24 (95% CI 1.05 to 1.47)

Typical RD 0.02 (95% CI 0.01 to 0.04)



Author’s Conclusions:

In extremely preterm infants, targeting lower (85% to 89%) SpO₂ compared

to higher (91% to 95%) SpO₂ had no significant effect on the composite

outcome of death or major disability or on major disability alone, including

blindness, but increased the average risk of mortality by 28 per 1000 infants

treated.

The trade-offs between the benefits and harms of the different oxygen

saturation target ranges may need to be assessed within local settings (e.g.

alarm limit settings, staffing, baseline outcome risks) when deciding on

oxygen saturation targeting policies.



Outcome of concern Appropriate choice of

saturation range (SpO₂)

Composite outcome of death or major

disability

lower (85% to 89%) or

higher (91% to 95%)

Death higher (91% to 95%)

Retinopathy of Prematurity lower (85% to 89%)

Necrotizing Enterocolitis higher (91% to 95%)

0

2

4

6

8

10

12

14

16

18

20

2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

Death

ROP

NEC

Death, Severe ROP and NEC in the Vermont Oxford Network 2005-16

% of VLBW(All centres)

Courtesy of Ben Stenson, MDVermont Oxford Network, unpublished data used by permission

Hitting our targets is easier said then done!

70

72

74

76

78

80

82

84

86

88

90

92

94

96

98

100

10:3

0

11:3

0

12:3

0

13:3

0

14:3

0

15:3

0

16:3

0

17:3

0

18:3

0

19:3

0

20:3

0

21:3

0

22:3

0

23:3

0

0:3

0

1:3

0

2:3

0

3:3

0

4:3

0

5:3

0

6:3

0

7:3

0

8:3

0

9:3

0

10:3

0

Time

Oxygen S

atu

ratio

n

02 SAT

High Alarm

Low Alarm

0

20

40

60

80

100

< 80% 80

%81

%82

%83

%84

%85

%86

%87

%88

%89

%90

%91

%92

%93

%94

%95

%96

%97

%98

%99

%10

0%

VON Day Oxygen Monitoring AuditSpot Oxygen Saturation

Infants on Oxygen and Respiratory Support(N = 697 Infants)

Num

ber

of

Infa

nts

Spot Oxygenation Saturation Spot Oxygen Saturation

Median spot saturation 94% (1st quartile 91%, 3rd quartile 97%)

What’s missing from this discussion?

Mean proportion of time in specified oxygen saturation range

Nurse:patient ratio and achievement of oxygen saturation goals in premature infants

Sink. Arch Dis Child Fetal Neonatal Ed. 2011

Dependent on:

Staff knowledge of unit policies and guidelinesNurse / patient ratioPatient acuityPatient age

Compliance with alarm limits for pulse oximetryin very preterm infants

Trials have now shown us the appropriate range to maintain oxygen saturation.

Maintaining appropriate oxygen saturation is a complex task that includes oxygen targets, alarm settings and staff response and unit culture.

MORE ON OXYGEN!

SUPPLEMENTAL THERAPEUTIC OXYGEN FOR PRETHRESHOLD ROP

Eligibility Criteria

• Preterm infants screened for ROP

• Prethreshold ROP in at least one eye

• Median pulse oximetry saturation < 94%

The STOP-ROP Multicenter Study Group 2000

SUPPLEMENTAL THERAPEUTIC OXYGEN FOR PRETHRESHOLD ROP

Intervention

• Continuous pulse oximetry monitoring

• Conventional arm: maintain oxygen saturation 89-94%

• Supplemental arm: maintain oxygen saturation 96-99%


0%

10%

20%

30%

40%

50%

60%

70%

PROGRESSION TO THRESHOLD

% C

AS

ES

SUPPLEMENTAL OXYGEN CONVENTIONAL MANAGEMENT


SUPPLEMENTAL THERAPEUTIC OXYGENFOR PRETHRESHOLD ROP


41% 48%

0%

10%

20%

30%

40%

50%

60%

70%


% C

AS

ES




SUBGROUP ANALYSIS: INFANTS WITH PLUS DISEASEPROGRESSION TO THRESHOLD

46%

32%

0%

10%

20%

30%

40%

50%

PNEUMONIA/CLD

% C

AS

ES




PNEUMONIA/EXACERBATION OF CHRONIC LUNG DISEASE

9%13%

Moving on from oxygen,How else can we prevent or treat

ROP?

LIGHT REDUCTION IN PREVENTING RETINOPATHY OF PREMATURITY

Glass and coworkers 1985

investigated effect of exposure to light in two intensive care nurseries

• standard bright nursery environment

• reduced light level environment

Effect of bright light in the Hospital Nursery on Retinopathy of Prematurity 1985

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

< 1000 G 1000-1500 G 1501-2000 G

% C

ASES

UNPROTECTED PROTECTED

Effect of bright light in the Hospital Nursery on Retinopathy of Prematurity 1985

LIGHT REDUCTION IN PREVENTING RETINOPATHY OF PREMATURITY

RETINOPATHY OF PREMATURITY

26%

18%

86%

54%

19%

8%

Early light reduction for preventing retinopathy of

prematurity in very low birth weight infants

Jorge EC, Jorge EN, El Dib RP. Early light reduction for preventing retinopathy of prematurity in very low birth

weight infants. Cochrane Database of Systematic Reviews 2001, Issue 1. Art. No.: CD000122. DOI:

10.1002/14651858.CD000122.

Early light reduction for preventing retinopathy of prematurity

in very low birth weight infants

Jorge EC, Jorge EN, El Dib RP. Early light reduction for preventing retinopathy of prematurity in very low birth weight infants. Cochrane Database of

Systematic Reviews 2001, Issue 1. Art. No.: CD000122. DOI: 10.1002/14651858.CD000122.

Seiberth 1994: 169 infants of less than 1501 grams birth weight from one nursery were enrolled and

then randomized to no patching or patching of both eyes from the day of birth until 35 weeks’

postmenstrual age.

Braz 2006: 226 infants of less than 1600 grams birth weight or < 32 weeks’ gestation were enrolled

and randomized. In the experimental group, patching of both eyes began on the day of birth and

continued until 35 weeks’ postmenstrual age.

Kennedy 1997: 71 infants weighing 1250 grams or less, or of gestational age 32 weeks or less, were

enrolled and randomized at 0 to 6 hours after birth to wearing goggles until 31 weeks’ postmenstrual

age.

Reynolds 1998: 409 infants of less than 31 weeks’ gestation and less than 1251 grams birth weight

were randomized to wearing goggles or control. The goggles were placed on the infant within 24

hours of birth, reducing light by 97% (100% of ultraviolet) and were continued until the infant was

31 weeks’ postmenstrual age or four weeks chronological age, whichever occurred later.

Early light reduction for preventing retinopathy of prematurity in

very low birth weight infants

Jorge EC, Jorge EN, El Dib RP. Early light reduction for preventing retinopathy of prematurity in very low birth

weight infants. Cochrane Database of Systematic Reviews 2001, Issue 1. Art. No.: CD000122. DOI:

10.1002/14651858.CD000122.

Effect on Any Retinopathy of Prematurity in infants < 2001 grams

Effect on “poor” Retinopathy of Prematurity outcomes in infants < 2001 grams

Typical Relative Risk and 95% CI

INTERVENTION (# STUDIES)

TypicalRisk Difference

(95% CI) 0.5 1.0 2.0 4.00.2


0.5 1.0 2.0 4.00.2

VITAMIN A (3) -0.14 (-0.27, -0.01)

OVERVIEW OF RANDOMIZED CONTROLLED TRIALS

VITAMIN E (7) -0.02 (-0.07, 0.02)

SUPEROXIDE DISMUTASE (1) 0.14 (-0.20, 0.47)

D-PENICILLAMINE (3) -0.04 (-0.12, 0.04)

COCHRANE NEONATAL REVIEW GROUP

EFECT OF ANTI OXIDANT THERAPYON RETINOPATHY OF PREMATURITY

Kaempfen S, Neumann RP, Jost K, Schulzke SM. Beta-blockers for prevention and treatment

of retinopathy of prematurity in preterm infants. Cochrane Database of Systematic Reviews

2015, Issue 9. Art. No.: CD011893. DOI: 10.1002/14651858.CD011893. (full review

pending publication January 2018)

Beta-blockers for prevention and treatment of

retinopathy of prematurity in preterm infants



Background: The use of beta-adrenergic blocking agents (beta-blockers),

which modulate the vasoproliferative retinal process, may reduce the

progression of ROP or even restore established ROP.

Objectives: To determine the effect of beta-blockers on short-term

structural outcomes, long-term functional outcomes, and the need for

additional treatment, when used either as prophylaxis in preterm infants

without ROP, stage 1 ROP (zone I), or stage 2 ROP (zone II) without plus

disease or as treatment in preterm infants with at least prethreshold ROP.

Three studies incorporating a total of 366 preterm infants met inclusion

criteria of this review (Filippi 2013; Korkmaz 2017; Sanghvi 2017).

These trials were conducted as ROP prevention trials and included preterm

infants diagnosed with ≤ stage 2 ROP without plus disease (Filippi 2013;

Korkmaz 2017) or preterm neonates in whom ROP was not assessed at

enrolment but very unlikely to be present as they were < 8 days old

(Sanghvi 2017).

Of the three included trials, two trials were placebo-controlled (Korkmaz

2017; Sanghvi 2017), while the third trial compared beta-blocker

administration to no treatment (Filippi 2013).



Effect on use or retinal ablation surgery

Typical RR 0.54 (95% CI 0.32 to 0.89)



Effect on use or retinal ablation surgery

Typical RD -0.09 (95% CI -0.16 to -0.02)



Effect on progression to stage 3 ROP

Typical RR 0.60 (95% CI 0.37 to 0.96)





Effect on progression to stage 3 ROP

Typical RD -0.15 (95% CI -0.28 to -0.02)

Outcome (# studies)

Hypotension (3)

Bronchopulmonary Dysplasia (2)

Necrotizing Enterocolitis (2)

Mortality (2)

Typical RR (95% CI)

7.00 (0.38 to 129.11)

1.14 (0.75 to 1.73)

2.45 (0.50 to 12.11)

0.99 (0.30 to 3.29)

Concern and impression regarding other important clinical outcomes



Beta-blockers for prevention and treatment

of retinopathy of prematurity in preterm infants

Authors' conclusions: Limited evidence of low to moderate quality

suggests that prophylactic administration of oral beta-blockers might

reduce progression towards stage 3 ROP and decrease the need of anti-

VEGF agents or laser therapy.

The clinical relevance of those findings is unclear as no data on long-term

visual impairment were reported.

Adverse events attributed to oral propranolol at a dose of 2 mg/kg/d raise

concerns regarding systemic administration of this drug for prevention of

ROP at the given dose.

Inositol in preterm infants

at risk for or having respiratory distress syndrome

Howlett A, Ohlsson A, Plakkal N. Inositol in preterm infants at risk for or having

respiratory distress syndrome. Cochrane Database of Systematic Reviews 2015,

Issue 2. Art. No.: CD000366. DOI: 10.1002/14651858.CD000366.pub3.

Background: Inositol is an essential nutrient required by human cells

in culture for growth and survival. Inositol promotes maturation of

several components of surfactant and may play a critical role in fetal

and early neonatal life.

Objectives: To assess the effectiveness and safety of supplementary

inositol in preterm infants with or without respiratory distress

syndrome (RDS) in reducing adverse neonatal outcomes.

Results: Four published RCTs and one ongoing RCT were identified





Effect on Neonatal Mortality

Typical RR 0.49 (95% CI 0.29 to 0.82)

Typical RD -0.09 (95% CI -0.16 to -0.03)

Effect on Retinopathy of Prematurity Stage > 3

Typical RR 0.09 (95% CI 0.01 to 0.67)

Typical RD -0.08 (95% CI -0.13 to -0.03)



NICHD Neonatal Research Network Inositol Trial

Concerning preliminary reports

Objective: To test the safety and efficacy of inositol to improve survival without severe ROP, defined as Type 1

ROP, in very preterm infants.

Design/Methods: We conducted a randomized, placebo controlled trial of Inositol (INS) in preterm infants.

18 centers of the NICHD Neonatal Research Network conducted a randomized controlled trial of 5% inositol

given daily to infants < 28 weeks’ gestation until 10 weeks chronologic age, 34 weeks’ postmenstrual age, or

discharge.

Preliminary results: The Data Safety Monitoring Committee ultimately recommended cessation of the trial for

a safety concern, unrelated to the manufacturing issue after enrollment of 638 infants.

The unfavorable outcome of Type 1 ROP or death prior to ROP determination was 21% in the placebo group,

and 29% in the INS group, p<0.01.

Late onset sepsis was more common in the INS group (26%, vs 20% in placebo), although the difference was

not statistically significant (p=0.06). Other diagnoses including BPD and severe IVH, adverse events, and

serious adverse events occurred at similar rates in the two groups.

Conclusion(s): Daily inositol at 80mg/kg/day for up to10 weeks did not benefit infants < 28 weeks’ gestation,

and may be harmful for extremely preterm infants. The biologic mechanism for these findings is unknown.

Treatment of Retinopathy of Prematurity

Peripheral retinal ablation for threshold retinopathy of

prematurity in preterm infants

Andersen C, Phelps D. Peripheral retinal ablation for threshold retinopathy of

prematurity in preterm infants. Cochrane Database of Systematic Reviews 1999, Issue 3.

Art. No.: CD001693. DOI: 10.1002/14651858.CD001693.

MULTICENTER TRIAL OF CRYOTHERAPY

• Infants weighing less than 1251 grams

• Ophthalmologic examinations to begin at 4-6 weeks of age

• Repeated every two weeks until “prethreshold”

• Repeated weekly until “threshold”

Cryotherapy for Retinopathy of Prematurity Cooperative Group 1988


“threshold” disease

at least five contiguous or eight cumulative 30 degree sectors of stage 3 ROP in zone 1 or 2 in the presence of plus disease



Randomization

• “symmetric”: both eyes meet threshold

one eye randomly assigned to treatment

• “asymmetric”: one eye met threshold

randomize worst eye



Unfavorable outcome

• a retinal fold involving the macula

• retinal detachment involving zone 1

• retrolental tissue or “mass”


0%

10%

20%

30%

40%

50%

60%

70%

UNFAVORABLE OUTCOME

% C

ASES

TREATED UNTREATED



UNFAVORABLE OUTCOME

22%

43%

COMPLICATIONS OF CRYOTHERAPY

Intraoperative ocular complications

• conjunctival hematoma 10%

• conjunctival hemorrhage 5%

Systemic complications

• bradycardia/arrhythmia 9%

• cyanosis 2%


LASER PHOTOCOAGULATION VS. CRYOTHERAPY FOR THRESHOLD ROP

VISUAL ACUITY

• Follow up at ten years of age

• Good outcome defined as 20/50 or better

• Odds ratio for “good outcome”:

5.2 (95% CI 1.4, 19.8)

NG and coworkers Ophthalmology 2002: 928-934

0%

10%

20%

30%

UNFAVORABLE OUTCOME

% C

ASES

PRETHRESHOLD CONVENTIONAL

Early Treatment for Retinopathy of Prematurity Cooperative Group. Arch Ophthalmol. 2003; 121: 1684-1696

EARLY TREATMENT FORRETINOPATHY OF PREMATURITY TRIAL

UNFAVORABLE OUTCOME

20%15%


0%

5%

10%

15%

20%

2000 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

ROP Surgery

VERMONT OXFORD NETWORK ANNUAL REPORTS 2000-2016

ANTI VEGF

IN THE TREATMENT

OF RETINOPATHY

OF PREMATURITY

Anti-vascular endothelial growth factor (VEGF) drugs for

treatment of retinopathy of prematurity

Sankar M Jeeva, Sankar J, Mehta M, Bhat V, Srinivasan R. Anti-vascular endothelial growth factor (VEGF) drugs

for treatment of retinopathy of prematurity. Cochrane Database of Systematic Reviews 2016, Issue 2. Art. No.:

CD009734. DOI: 10.1002/14651858.CD009734.pub2. (update pending publication December 2017)

Anti-vascular endothelial growth factor (VEGF) drugs

for treatment of retinopathy of prematurity

Structural outcome: partial or complete retinal detachment



CD009734. DOI: 10.1002/14651858.CD009734.pub2.

Anti-vascular endothelial growth factor (VEGF) drugs

for treatment of retinopathy of prematurity



CD009734. DOI: 10.1002/14651858.CD009734.pub2.

Recurrence of ROP

Data from the Canadian Neonatal Network demonstrated 3.1

times higher odds (95% CI 1.2 to 8.4) in infants (gestation less

than 29 weeks) treated with bevacizumab versus laser, after

adjusting for key confounders like gestation, gender, maternal

education, Score for Neonatal Acute Physiology-II (SNAP-II)

score, bronchopulmonary dysplasia, sepsis, and severe brain

injury further underscore the importance of evaluating long-term

safety outcomes following anti-VEGF therapy.

Morin and colleagues. Canadian Neonatal Network and the Canadian Neonatal Follow-Up Network

Investigators. Neurodevelopmental outcomes following bevacizumab injections for retinopathy of prematurity.

Pediatrics 2016;137(4):e20153218.

Anti-vascular endothelial growth factor (VEGF) drugs for

treatment of retinopathy of prematurity

“Given the potential risk of systemic absorption and

consequent adverse effects like cerebrovascular

accidents following intravitreal anti-VEGF therapy, the

lack of evidence on safety outcomes is a major

concern”.

Sankar and colleagues. Anti-vascular endothelial growth factor (VEGF) drugs for treatment of retinopathy of

prematurity. Cochrane Database of Systematic Reviews 2016, Issue 2. Art. No.: CD009734. DOI:

10.1002/14651858.CD009734.pub2. (update pending publication December 2017)

Scanning the Horizon

James Hagadorn, MD

Associate Professor of Pediatrics

University of Connecticut School of Medicine

Scanning the Horizon

Characteristics of infants with severe

retinopathy of prematurity in countries with

low, moderate, and high levels of development:

implications for screening programs.

Gilbert C, Fielder A, Gordillo L, Quinn G, Semiglia R, Visintin

P, Zin A; International NO-ROP Group.

Pediatrics. 2005 May;115(5):e518-25. Epub 2005 Apr 1.

Gilbert and colleagues. Pediatrics. 2005 May;115(5):e518-25. Epub 2005 Apr 1.

OBJECTIVE:

The proportion of blindness as a result of ROP varies greatly among countries depending on their

level of development, being influenced by the availability of neonatal care, neonatal outcomes, and

whether effective screening and treatment programs are in place.

The objective of this study was to compare characteristics of premature infants who developed

severe ROP between 1996 and 2002 in highly developed countries with less developed countries.

METHODS:

This was an observational study. A questionnaire was completed by ophthalmologists in countries

with low, moderate, and high development rankings (3 highly developed countries and from 10 less

well-developed countries) who screen for ROP in which they supplied birth weights and

gestational ages (GAs) of infants who were treated for threshold ROP or identified with more

advanced stages of the disease. Birth weights and GAs of infants with severe ROP were measured.

Box plots of birth

weights of infants

reported with

severe ROP from

13 countries with

varying levels of

development.

Box plots of

gestational ages

of infants reported

with severe ROP

from 13 countries

with varying

levels of

development.

Gilbert and colleagues. Pediatrics. 2005 May;115(5):e518-25. Epub 2005 Apr 1.

CONCLUSIONS:

These findings suggest that larger, more mature infants are

developing severe ROP in countries with low/moderate levels of

development compared with highly developed countries. ROP

screening programs need to use criteria that are appropriate for

their local population.

RETINOPATHY OF PREMATURITY

Limited ability to prevent Retinopathy of Prematurity

Effective: Appropriate Oxygen Restriction and MonitoringIneffective: Vitamin E, Superoxide dismutase, Light reductionJury still out: Vitamin A, Inositol, B blockers

Treatment of pre-threshold ROP

Effective: Retinal ablation surgeryIneffective: Supplemental oxygen in evolving ROPJury still out: Anti VEGF Therapy

Questions/Discussion?

Housekeeping details!

CME credit?

https://neonatal.cochrane.org/decembe

r-2017-continuing-medical-education-

credit-and-nursing-contact-hour-credit

Next web seminar?

Making the GRADE: Understanding the strength of the evidence

Late winter 2018

https://neonatal.cochrane.org/december-2017-continuing-medical-education-credit-and-nursing-contact-hour-credit

title of program: preventing and treating …...the university of vermont designates this web...

Documents